Azithromycin in pediatrics patients , for what we can give them
Reading File
Finding Sources
Finding Sources
Reading File
Reading File
Reading File
Reading File
I now have comprehensive data from the Harriet Lane Handbook. Here is the full summary:
Azithromycin in Pediatric Patients
Azithromycin (Zithromax) is a macrolide antibiotic with a broad range of pediatric indications. Below is a structured overview of uses and dosing, sourced from the Harriet Lane Handbook (23rd ed.) and Red Book 2021.
Indications & Pediatric Dosing
1. Community-Acquired Pneumonia (CAP) — ≥3 months
| Route | Dose |
|---|---|
| Oral (mild/step-down) | 10 mg/kg PO on Day 1 (max 500 mg), then 5 mg/kg/day PO Days 2–5 (max 250 mg/day) |
| IV then PO (severe) | 10 mg/kg/dose IV once daily × ≥2 days → 5 mg/kg/dose PO to complete 5-day course |
2. Pharyngitis / Tonsillitis (Group A Strep) — Ages 2–15 years
- 12 mg/kg/day PO once daily × 5 days (max 500 mg/day)
- Used when penicillin allergy is present
3. Acute Sinusitis — ≥6 months
- 10 mg/kg/dose PO once daily × 3 days (max 500 mg)
4. Pertussis (Whooping Cough)
| Age | Dose |
|---|---|
| 1–<6 months | 10 mg/kg/day PO once daily × 5 days |
| ≥6 months | 10 mg/kg PO on Day 1 (max 500 mg), then 5 mg/kg/day PO Days 2–5 (max 250 mg) |
Drug of choice for pertussis treatment and post-exposure prophylaxis in infants and children.
5. Mycobacterium avium Complex (MAC) in HIV-infected children
| Purpose | Dose |
|---|---|
| Primary prophylaxis | 20 mg/kg/dose PO once weekly (max 1200 mg); or 5 mg/kg/day PO (max 250 mg) |
| Secondary prophylaxis | 5 mg/kg/day PO (max 250 mg) + ethambutol ± rifabutin |
| Treatment | 10–12 mg/kg/day PO (max 500 mg/day) × ≥1 month + ethambutol ± rifabutin |
6. Endocarditis Prophylaxis
- 15 mg/kg/dose PO × 1 (max 500 mg), given 30–60 minutes before dental procedure
- Used in children with penicillin allergy
7. Cystic Fibrosis — Anti-inflammatory Use
| Weight | Dose |
|---|---|
| <18 kg | 10 mg/kg/dose PO every Mon/Wed/Fri |
| 18–<36 kg | 250 mg PO every Mon/Wed/Fri |
| ≥36 kg | 500 mg PO every Mon/Wed/Fri |
8. Bacterial Conjunctivitis (Ophthalmic — AzaSite 1%)
- ≥1 year: 1 drop in affected eye(s) BID (8–12 hr apart) × 2 days, then 1 drop once daily × 5 days
9. Other Indications (per Red Book 2021)
- Babesiosis — atovaquone + azithromycin combination
- Bartonella henselae (Cat-scratch disease)
- Chlamydia trachomatis infections
- Mycoplasma pneumoniae pneumonia
- Legionella pneumophila infections
- Lyme disease (alternative agent)
- Salmonella / Shigella infections
- Ureaplasma infections
- Genital ulcer disease / urethritis / cervicitis (adolescents)
Important Safety Points
- Not recommended for otitis media — increased resistant pathogens
- Contraindicated in macrolide hypersensitivity and prior cholestatic jaundice with azithromycin use
- Use caution with: hepatic impairment, GFR <10 mL/min, QT prolongation, hypokalemia, hypomagnesemia, bradycardia, arrhythmias
- Infantile hypertrophic pyloric stenosis has been reported — caution in neonates/young infants
- Cardiac risk: Can prolong QT interval — avoid in children on other QT-prolonging agents
- CNS penetration is poor
- Antacids (Al/Mg) reduce absorption — avoid concomitant use
- Macrolide resistance is a growing concern (>90% resistance in Mycoplasma in some Asian countries)
— The Harriet Lane Handbook, 23rd ed. (Johns Hopkins Hospital) | Red Book 2021, AAP Committee on Infectious Diseases
This is a shared conversation. Sign in to Orris to start your own chat.